Etching a substrate: processes – Forming or treating thermal ink jet article
Patent
1996-05-02
1998-06-09
Chapman, Mark
Etching a substrate: processes
Forming or treating thermal ink jet article
156234, 156235, B32B 3100
Patent
active
057628122
ABSTRACT:
Disclosed is a thermal ink jet printhead which comprises (a) an upper substrate with a set of parallel grooves for subsequent use as ink channels and a recess for subsequent use as a manifold, the grooves being open at one end for serving as droplet emitting nozzles; and (b) a lower substrate in which one surface thereof has an array of heating elements and addressing electrodes formed thereon, the lower substrate having a thick film insulative layer deposited over the heating elements and addressing electrodes and patterned to form recesses therethrough to expose the heating elements and terminal ends of the addressing electrodes; said upper and lower substrates being aligned, mated, and bonded together to form the printhead with the grooves in the upper substrate being aligned with the heating elements in the lower substrate to form droplet emitting nozzles, wherein the upper and lower substrates are bonded together with an adhesive which comprises a reaction product of (a) an epoxy resin selected from the group consisting of (1) those of the formula ##STR1## wherein n is an integer of from 1 to about 25; (2) those of the formula ##STR2## wherein n is an integer of from 1 to about 25; (3) those of the formula ##STR3## and (4) mixtures thereof; and (b) a curing agent which enables substantial curing of the epoxy resin at a temperature of not lower than the softening point of the resin and not higher than about 20.degree. C. above the softening point of the resin within a period of no more than about 3 hours. Also disclosed are processes for preparing a thermal ink jet printhead with the aforementioned adhesive components.
REFERENCES:
patent: 4601777 (1986-07-01), Hawkins et al.
patent: 4678529 (1987-07-01), Drake et al.
patent: 5218381 (1993-06-01), Narang et al.
patent: 5336319 (1994-08-01), Narang et al.
Byorick Judith L.
Chapman Mark
Xerox Corporation
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